For the citrate utilization test, the bromthymol blue indicator change from blue to green when the microorganism metabolizes citrate.

a. true
b. false


Answer: b. false

Biology & Microbiology

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Consider a community in which the vaccination rate for measles is 99 percent. Ryan, a 2-year-old with leukemia, has not received the measles vaccination because of his immunocompromised status. Ryan is unlikely to get measles because

A. the measles virus does not typically affect children with leukemia. B. measles has been completely eradicated and is no longer a threat. C. there is substantial herd immunity in his community. D. he is protected by antibodies from his mother that crossed the placenta.

Biology & Microbiology

Any given cell must have:

A. cell membrane B. Ribosome C. Flagella D. Chromosome E. Glycocalyx A. A, B, and D B. A and D C. A, B, C, and D D. A, B, and C E. A, C, D, and E

Biology & Microbiology

Which of these muscles would be most involved in a forcible exhalation, as in a sneeze?

A) sartorius B) rectus abdominis C) deltoid D) gastrocnemius

Biology & Microbiology

One of the advantages of STR profiling over VNTR profiling is that ________

A) STRs are variable in the number of repeats, whereas VNTRs are not B) it presents more variable sequences reducing false positive matches C) STRs are not variable in the number of repeats, whereas VNTRs are D) it requires much less DNA because PCR can be used to amplify small samples

Biology & Microbiology